Put all IPs for a jail into sshd_config as ListenAddress values so that you can ssh in over experimental links.  We still cannot just use INADDR_ANY for sshd because of the sshd running outside the jails (its a long story...)
Put all IPs for a jail into sshd_config as ListenAddress values so that
you can ssh in over experimental links.  We still cannot just use INADDR_ANY
for sshd because of the sshd running outside the jails (its a long story...)

Also consolidated many similar system() invocations so we don't do quite so
many fork/execs.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome